<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="city of hotCities"
            :key="city.id"
            @tap="handleCityClick(city.name);"
          >
            <div class="button">{{city.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(alphaType,key) of allCities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="city of alphaType"
            :key="city.id"
            @tap="handleCityClick(city.name)"
          >{{city.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from "better-scroll";
import { mapState, mapMutations } from "vuex";
export default {
  name: "CityList",
  props: {
    hotCities: Array,
    allCities: Object,
    curLoactionLetter: String
  },
  methods: {
    ...mapMutations({
      updateCity: "updateCity"
    }),
    handleCityClick(city) {
      this.updateCity(city);
      this.$router.push("/");
    }
  },
  watch: {
    curLoactionLetter() {
      if (this.curLoactionLetter) {
        this.scroll.scrollToElement(this.$refs[this.curLoactionLetter][0]);
      }
    }
  },
  computed: {
    ...mapState({
      city: "city"
    })
  },
  mounted() {
    this.scroll = new BScroll(this.$refs.wrapper, {
      mouseWheel: true,
      tap: true
    });
  }
};
</script>

<style lang="stylus" scoped>
@import '~@/assets/styles/varibles.styl';

.border-topbottom {
  &:before {
    border-color: #ccc;
  }

  $:after {
    border-color: #ccc;
  }
}

.border-bottom {
  &:before {
    border-color: #ccc;
  }
}

.list {
  overflow: hidden;
  position: absolute;
  top: 1.78rem;
  left: 0;
  right: 0;
  bottom: 0;

  .title {
    text-align: left;
    line-height: 0.5rem;
    background: #eee;
    padding-left: 0.2rem;
    color: #666;
    font-size: 0.26rem;
  }

  .button-list {
    overflow: hidden;
    padding: 0.1rem 0.6rem 0.1rem 0.1rem;

    .button-wrapper {
      float: left;
      width: 33.33%;

      .button {
        padding: 0.1rem 0;
        margin: 0.1rem;
        border: 0.02rem solid #ccc;
        border-radius: 0.06rem;
      }
    }
  }

  .item-list {
    .item {
      text-align: left;
      line-height: 0.76rem;
      padding-left: 0.2rem;
    }
  }
}
</style>